LT1190_01 [Linear]
Ultrahigh Speed Operational Amplifier; 超高速运算放大器
| 型号： | LT1190_01 |
| 厂家： | 
Linear |
| 描述： | Ultrahigh Speed Operational Amplifier |
| 文件： | 总12页 (文件大小：257K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1190
Ultrahigh Speed
Operational Amplifier
U
FEATURES
DESCRIPTIO
The LT®1190 is a video operational amplifier optimized for
operation on ±5V, and a single 5V supply. Unlike many
high speed amplifiers, this amplifier features high open-
loop gain, over 85dB, and the ability to drive heavy loads
to a full-power bandwidth of 20MHz at 7VP-P. In addition
to its very fast slew rate, the LT1190 features a unity-
gain-stable bandwidth of 50MHz and a 75° phase margin,
making it extremely easy to use.
■
Gain Bandwidth Product, AV = 1: 50MHz
■
Slew Rate: 450V/µs
■
Low Cost
■
Output Current: ±50mA
■
Settling Time: 140ns to 0.1%
■
Differential Gain Error: 0.1%, (RL = 1k)
■
Differential Phase Error: 0.06°, (RL = 1k)
■
High Open-Loop Gain: 10V/mV Min
■
Single Supply 5V Operation
Output Shutdown
Because the LT1190 is a true operational amplifier, it is an
ideal choice for wideband signal conditioning, fast inte-
grators, active filters, and applications requiring speed,
accuracy and low cost.
■
U
APPLICATIO S
The LT1190 is available in 8-pin PDIP and SO packages
with standard pinouts. The normally unused Pin 5 is used
for a shutdown feature that shuts off the output and
reduces power dissipation to a mere 15mW.
■
Video Cable Drivers
■
Video Signal Processing
■
Fast Integrators
Pulse Amplifiers
D/A Current to Voltage Conversion
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Video MUX Cable Driver
5V
7
3
V
+
–
IN1
Inverter Pulse Response
6
LT1190
SHDN
2
CMOS IN
CH. SELECT
5
4
1k
–5V
1k
1k
CABLE
75Ω
74HC04
74HC04
75Ω
1k
V
–5V
5V
5
3
+
IN2
7
SHDN
LT1190
6
2
1190 TA02
4
AV = –1, CL = 10pF SCOPE PROBE
–
–5V
1k
1k
LT1190 • TA01
1
LT1190
W W
U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
Total Supply Voltage (V + to V –) ............................. 18V
Differential Input Voltage ....................................... ± 6V
Input Voltage .......................................................... ±VS
Output Short-Circuit Duration (Note 2)........ Continuous
Maximum Junction Temperature ......................... 150°C
Operating Temperature Range
LT1190M (OBSOLETE) ............. –55°C to 125°C
LT1190C............................................... 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
TOP VIEW
NUMBER
BAL
–IN
+IN
1
2
3
4
8
7
6
5
BAL
+
V
LT1190CN8
LT1190CS8
OUT
–
V
SHDN
S8 PART MARKING
1190
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 100°C/W (N8)
TJMAX = 150°C, θJA = 150°C/W (S8)
LT1190MJ8
LT1190CJ8
J8 PACKAGE 8-LEAD CERDIP
TJMAX = 150°C, θJA = 100°C/W
OBSOLETE PACKAGE
Consider the N8 or S8 Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature
ranges.
ELECTRICAL CHARACTERISTICS VS = ±5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1190M/C
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
N8 Package
SO-8 Package
3
10
15
mV
mV
OS
I
I
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
0.2
±0.5
50
1.7
µA
µA
OS
±2.5
B
e
f = 10kHz
nV/√Hz
pA/√Hz
kΩ
n
O
i
f = 10kHz
O
4
n
R
Differential Mode
Common Mode
130
5
IN
MΩ
pF
C
Input Capacitance
A = 1
V
2.2
IN
Input Voltage Range
(Note 3)
–2.5
60
3.5
V
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= – 2.5V to 3.5V
70
70
dB
CM
V = ± 2.375V to ± 8V
S
60
dB
A
R = 1k, V = ± 3V
10
2.5
3.5
22
6
12
V/mV
V/mV
V/mV
VOL
L
O
R = 100Ω, V = ±3V
L
O
V = ±8V, R = 100Ω, V = ± 5V
S
L
O
V
Output Voltage Swing
V = ±5V, R = 1k
±3.7
±6.7
±4
±7
V
V
OUT
S
L
V = ±8V, R = 1k
S
L
SR
Slew Rate
A = –1, R = 1k (Notes 4, 9)
325
450
23.9
50
V/µs
MHz
MHz
ns
V
O
L
FPBW
GBW
Full-Power Bandwidth
Gain Bandwidth Product
Rise Time, Fall Time
Rise Time, Fall Time
Propagation Delay
Overshoot
V
= 6V (Note 5)
17.2
P-P
t , t
r1 f1
A = 50, V = ± 1.5V, 20% to 80%, (Note 9)
175
250
1.9
2.4
5
325
V
O
t , t
r2 f2
A = 1, V = ± 125mV, 10% to 90%
ns
V
O
t
A = 1, V = ± 125mV, 50% to 50%
ns
PD
s
V
O
A = 1, V = ± 125mV
%
V
O
t
Settling Time
3V Step, 0.1% (Note 6)
140
ns
2
LT1190
ELECTRICAL CHARACTERISTICS
VS = ±5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1190M/C
SYMBOL PARAMETER
CONDITIONS
R = 150Ω, A = 2 (Note 7)
MIN
TYP
0.35
0.16
32
MAX
UNITS
Diff A
Differential Gain
%
V
L
V
Diff Ph
Differential Phase
Supply Current
R = 150Ω, A = 2 (Note 7)
Deg
P-P
L
V
I
38
2
mA
mA
µA
ns
S
–
–
Shutdown Supply Current
Shutdown Pin Current
Turn On Time
Pin 5 at V
Pin 5 at V
1.3
I
t
t
20
50
SHDN
ON
–
Pin 5 from V to Ground, R = 1k
100
400
L
–
Turn Off Time
Pin 5 from Ground to V , R = 1k
ns
OFF
L
VS+ = 5V, VS– = 0V, VCM = 2.5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1190M/C
TYP
SYMBOL PARAMETER
CONDITIONS
MIN
MAX
UNITS
V
OS
Input Offset Voltage
N8 Package
SO-8 Package
3
11
15
mV
mV
I
I
Input Offset Current
0.2
1.2
±1.5
3.5
µA
µA
OS
Input Bias Current
±0.5
B
Input Voltage Range
(Note 3)
2
V
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
V
= 2V to 3.5V
55
2.5
3.6
70
7
dB
CM
A
VOL
V
OUT
R = 100Ωto Ground, V = 1V to 3V
V/mV
V
L
O
R = 100Ωto Ground
V
High
Low
3.8
0.25
250
47
L
OUT
V
0.4
V
OUT
SR
Slew Rate
A = –1, V = 1V to 3V
V
V/µs
MHz
mA
mA
µA
O
GBW
Gain Bandwidth Product
Supply Current
I
I
24.5
29
36
2
S
–
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V
Pin 5 at V
1.2
20
–
50
SHDN
The ● denotes the specifications which apply over the full operating temperature range of –55°C ≤ TA ≤ 125°C.
VS = ±5V, Pin 5 open circuit unless otherwise noted.
LT1190M
TYP
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
MIN
MAX
UNITS
mV
V
OS
N8 Package
●
●
●
●
●
●
5
14
∆V /∆T Input V Drift
16
µV/°C
µA
OS
OS
I
I
Input Offset Current
0.2
±0.5
70
2
OS
Input Bias Current
±2.5
µA
B
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
CM
= –2.5V to 3.5V
55
55
dB
V = ±2.375V to ±5V
S
70
dB
A
VOL
R = 1k, V = ±3V
●
●
8
1
16
2.5
V/mV
V/mV
L
O
R = 100Ω, V = ±3V
L
O
V
Output Voltage Swing
Supply Current
R = 1k
●
●
●
●
±3.7
±3.9
32
V
mA
mA
µA
OUT
L
I
I
38
S
–
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V (Note 8)
1.5
20
2.5
–
Pin 5 at V
SHDN
3
LT1190
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range of 0°C ≤ TA ≤ 70°C. VS = ±5V, Pin 5 open circuit unless otherwise noted.
LT1190C
TYP
SYMBOL PARAMETER
Input Offset Voltage
CONDITIONS
MIN
MAX
UNITS
V
N8 Package
SO-8 Package
●
3
11
18
mV
mV
OS
∆V /∆T Input V Drift
●
●
●
●
●
16
0.2
±0.5
70
µV/°C
µA
OS
OS
I
I
Input Offset Current
1.7
OS
Input Bias Current
±2.5
µA
B
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= – 2.5V to 3.5V
58
58
dB
CM
V = ±2.375V to ±5V
S
70
dB
A
VOL
R = 1k, V = ±3V
R = 100Ω, V = ±3V
●
●
9
2
20
6
V/mV
V/mV
L
O
L
O
V
Output Voltage Swing
Supply Current
R = 1k
●
●
●
●
±3.7
±3.9
32
V
mA
mA
µA
OUT
L
I
I
38
S
–
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V (Note 8)
1.4
20
2.1
–
Pin 5 at V
SHDN
Note 6: Settling time measurement techniques are shown in “Take the
Guesswork Out of Settling Time Measurements,” EDN, September 19,
Note 1: Absolute maximum ratings are those values beyond which the life
of the device may be impaired.
Note 2: A heat sink is required to keep the junction temperature below
absolute maximum when the output is shorted.
1985. A = –1, R = 1k.
V
L
Note 7: NTSC (3.58MHz). For R = 1k, Diff A = 0.1%, Diff Ph = 0.06°.
L
V
Note 8: See Applications section for shutdown at elevated temperatures.
Note 3: Exceeding the input common mode range may cause the output
to invert.
Do not operate the shutdown above T > 125°C.
J
Note 9: AC parameters are 100% tested on the ceramic and plastic DIP
packaged parts (J and N suffix) and are sample tested on every lot of the
SO packaged parts (S suffix).
Note 4: Slew rate is measured between ±1V on the output, with a ±3V
input step.
Note 5: Full-power bandwidth is calculated from the slew rate
measurement:
FPBW = SR/2πV .
P
Optional Offset Nulling Circuit
5V
3
2
7
+
6
LT1190
4
–
8
–5V
1
INPUT OFFSET VOLTAGE CAN BE ADJUSTED OVER A ±150mV
RANGE WITH A 1kΩ TO 10kΩ POTENTIOMETER
LT1190 • TA03
4
LT1190
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
Input Bias Current
vs Temperature
Common Mode Voltage
vs Supply Voltage
4
3
–0.3
–0.4
10
8
V
S
= ±5V
–55°C
25°C
V = ±5V
S
6
+V COMMON MODE
°
125 C
4
+I
–I
2
1
B
–0.5
–0.6
–0.7
–0.8
2
I
OS
0
25°C
–2
–4
–6
–8
–10
–55°C
0
–1
–2
–55°C
25°C
125°C
–V COMMON MODE
B
125°C
–4 –3 –2 –1
0
1
2
3
4
–50 –25
0
25
50
75 100 125
0
2
4
6
8
10
COMMON MODE VOLTAGE (V)
TEMPERATURE (°C)
±V SUPPLY VOLTAGE (V)
LT1190 • TPC01
LT1190 • TPC02
LT1190 • TPC03
Equivalent Input Noise Voltage
vs Frequency
Equivalent Input Noise Current
vs Frequency
Supply Current vs Supply Voltage
80
60
40
2000
1800
1600
1400
1200
1000
800
40
30
20
10
0
V
T
= ±5V
V
T
= ±5V
= 25°C
= 0Ω
S
S
= 25°C
A
A
R
= 100k
R
S
S
–55°C
125°C
25°C
600
20
0
400
200
0
10
100
1k
10k
100k
10
100
1k
10k
100k
0
2
4
6
8
10
FREQUENCY (Hz)
FREQUENCY (Hz)
±SUPPLY VOLTAGE (V)
LT1190 • TPC05
LT1190 • TPC04
LT1190 • TPC06
Shutdown Supply Current
vs Temperature
Open-Loop Voltage Gain
vs Temperature
Open-Loop Voltage Gain
vs Load Resistance
5.0
4.5
30k
30k
20k
10k
0
V
= ±5V
V
V
= ±5V
= ±3V
V
V
= ±5V
= ±3V
S
S
O
S
O
R = 1k
L
V
= –V + 0.4V
EE
SHDN
4.0
3.5
3.0
2.5
2.0
1.5
1.0
20k
10k
V
= –V + 0.2V
EE
SHDN
R = 100Ω
L
V
= –V
50
SHDN
25
EE
0
–50 –25
0
75 100 125
–50 –25
0
25
50
75 100 125
10
100
1000
TEMPERATURE (°C)
TEMPERATURE (°C)
LOAD RESISTANCE (Ω)
LT1190 • TPC07
LT1190 • TPC08
LT1190 • TPC09
5
LT1190
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Bandwidth Product
vs Supply Voltage
Gain, Phase vs Frequency
Output Impedance vs Frequency
100
80
60
40
20
0
100
80
60
40
20
0
100
10
55
50
V
T
= ±5V
= 25°C
= 1k
V
T
= ±5V
S
S
A
= 25°C
A
PHASE
R
L
T
A
= –55°C, 25°C, 125°C
45
40
A
V
= –100
1
A
V
= –1
V
35
30
25
A
= –10
GAIN
0.1
0.01
–20
–20
100k
1M
10M
100M
1G
1k
10k
100k
1M
10M
100M
0
2
4
6
8
10
FREQUENCY (Hz)
FREQUENCY (Hz)
±V SUPPLY VOLTAGE (V)
LT1190 • TPC10
LT1190 • TPC12
LT1190 • TPC11
Power Supply Rejection Ratio
vs Frequency
Unity Gain Frequency and
Common Mode Rejection Ratio
vs Frequency
Phase Margin vs Temperature
80
75
70
65
60
80
75
70
65
60
60
50
40
30
20
10
0
80
60
V
= ±5V
= 25°C
= 1k
S
A
L
V
V
A
= ±5V
RIPPLE
= 25°C
S
T
= ±300mV
PHASE MARGIN
R
T
40
–PSRR
20
+PSRR
UNITY GAIN FREQUENCY
55
50
45
40
55
50
45
40
0
V
= ±5V
= 1k
S
L
R
–20
–50 –25
0
25
50
75 100 125
100k
1M
10M
100M
1G
1k
10k
100k
1M
10M
100M
TEMPERATURE (°C)
FREQUENCY (Hz)
FREQUENCY (Hz)
LT1190 • TPC14
LT1190 • TPC13
LT1190 • TPC15
Output Short-Circut Current
vs Temperature
Output Voltage Swing
vs Load Resistance
Output Swing vs Supply Voltage
100
90
10
8
5
3
V
S
= ±5V
R
L
= 1k
V
= ±5V
S
+V , 25°C,
T = –55°C
A
OUT
125°C, –55°C
6
T
A
= 25°C
4
1
2
T
A
= 125°C
0
–1
–3
–5
–2
–4
80
–V , –55°C,
OUT
25°C, 125°C
T
= 125°C
A
–6
–8
T
A
= –55°C, 25°C
70
–10
–50 –25
0
25
50
75 100 125
0
2
4
6
8
10
10
100
LOAD RESISTANCE (Ω)
1000
TEMPERATURE (°C)
±V SUPPLY VOLTAGE (V)
LT1190 • TPC16
LT1190 • TPC17
LT1190 • TPC18
6
LT1190
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Voltage Step
vs Settling Time, AV = –1
Output Voltage Step
vs Settling Time, AV = +1
Slew Rate vs Temperature
600
500
400
300
4
2
4
2
V
T
= ±5V
= 25°C
= 1k
V
T
= ±5V
= 25°C
= 1k
V
T
= ±5V
= 25°C
= 1k
S
S
S
A
A
A
R
L
R
L
R
L
–SLEW RATE
+SLEW RATE
1mV
1mV
V
= ±2V
O
10mV
10mV
0
0
–2
–4
–2
–4
10mV
1mV
1mV
10mV
–50 –25
0
25
50
75 100 125
50 70
90 110 130 150 170 190
SETTLING TIME (ns)
0
50 100 150 200 250 300 350
SETTLING TIME (ns)
TEMPERATURE (°C)
LT1190 • TPC19
LT1190 • TPC20
LT1190 • TPC21
Large-Signal Transient Response
Small-Signal Transient Response
Output Overload
1190 G22
1190 G24
AV = +1, CL = 10pF SCOPE PROBE
AV = +1, SMALL-SIGNAL RISE TIME, 1190 G23
WITH FET PROBES
AV = –1, VIN = 12VP-P
7
LT1190
W U U
U
APPLICATIO S I FOR ATIO
Power Supply Bypassing
In most applications, and those requiring good settling
time, it is important to use multiple bypass capacitors. A
0.1µF ceramic disc in parallel with a 4.7µF tantalum is
recommended. Two oscilloscope photos with different
bypass conditions are used to illustrate the settling time
characteristics of the amplifier. Note that although the
outputwaveformlooksacceptableat1V/DIV, whenampli-
fied to 1mV/DIV the settling time to 2mV is 4.244µs for the
0.1µF bypass; the time drops to 163ns with multiple
bypass capacitors.
The LT1190 is quite tolerant of power supply bypassing.
In some applications a 0.1µF ceramic disc capacitor
placed 1/2 inch from the amplifier is all that is required. A
scope photo of the amplifier output with no supply
bypassing is used to demonstrate this bypassing toler-
ance, RL = 1kΩ.
No Supply Bypass Capacitors
Settling Time Poor Bypass
VOUT
1mV/DIV
VOUT
1V/DIV
0V
LT1190 • TA04
AV = –1, IN DEMO BOARD, RL = 1kΩ
LT1190 • TA06
Supply bypassing can also affect the response in the
frequency domain. It is possible to see a slight 1dB rise in
the frequency response at 130MHz depending on the gain
configuration, supply bypass, inductance in the supply
leads and printed circuit board layout. This can be further
minimized by not using a socket.
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1µF
Settling Time Good Bypass
Closed-Loop Voltage Gain vs Frequency
20
V
T
= ±5V
= 25°C
= 1k
VOUT
1mV/DIV
S
VOUT
1V/DIV
0V
A
R
L
10
0
A
= 2
= 1
V
A
V
LT1190 • TA07
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1µF + 4.7µF TANTALUM
–10
–20
100k
1M
10M
FREQUENCY (Hz)
100M
1G
LT1190 • TA05
8
LT1190
W U U
APPLICATIO S I FOR ATIO
U
Cable Terminations
Using the Shutdown Feature
The LT1190 operational amplifier has been optimized as a
lowcostvideocabledriver.The±50mAguaranteedoutput
current enables the LT1190 to easily deliver 7.5VP-P into
100Ω, while operating on ±5V supplies or 2.6VP-P on a
single 5V supply.
The LT1190 has a unique feature that allows the amplifier
to be shut down for conserving power or for multiplexing
several amplifiers onto a common cable. The amplifier will
shut down by taking Pin 5 to V–. In shutdown, the
amplifier dissipates 15mW while maintaining a true high
impedance output state of 15kΩ in parallel with the
feedback resistors. The amplifiers must be used in a
noninverting configuration for MUX applications. In in-
verting configurations the input signal is fed to the output
through the feedback components. The following scope
photosshowthatwithveryhighRL, theoutputistrulyhigh
impedance; the output slowly decays toward ground.
Additionally,whentheoutputisloadedwithaslittleas1kΩ
the amplifier shuts off in 400ns. This shutoff can be under
the control of HC CMOS operating between 0V and – 5V.
Double Terminated Cable Driver
5V
3
2
7
+
CABLE
75Ω
6
LT1190
–
4
–5V
75Ω
R
FB
R
G
Cable Driver Voltage Gain vs Frequency
10
A
FB
= 2
V
T
= ±5V
= 25°C
V
S
A
R
= 1k
8
6
R
= 330Ω
G
4
Output Shutdown
A
= 1
= 1k
= 1k
V
R
2
FB
R
G
0
0V
VSHDN
–2
–4
–6
–5V
–8
VOUT
–10
100k
1M
10M
100M
FREQUENCY (Hz)
LT1190 • TA08
When driving a cable it is important to terminate the cable
to avoid unwanted reflections. This can be done in one of
two ways: single termination or double termination. With
single termination, the cable must be terminated at the
receiving end (75Ω to ground) to absorb unwanted en-
ergy. The best performance can be obtained by double
termination(75Ωinserieswiththeoutputoftheamplifier,
and 75Ω to ground at the other end of the cable). This
termination is preferred because reflected energy is ab-
sorbed at each end of the cable. When using the double
terminationtechniqueitisimportanttonotethatthesignal
is attenuated by a factor of 2, or 6dB. This can be compen-
sated for by taking a gain of 2, or 6dB in the amplifier. The
cable driver has a – 3dB bandwidth in excess of 30MHz
while driving the 150Ω load.
LT1190 • TA09
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = SCOPE PROBE
Output Shutdown
0V
VSHDN
–5V
VOUT
LT1190 • TA10
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = 1kΩ
9
LT1190
W U U
U
APPLICATIO S I FOR ATIO
The ability to maintain shutoff is shown on the curve
Shutdown Supply Current vs Temperature in the Typical
Performance Characteristics section. At very high
elevated temperatures it is important to hold the shut-
down pin close to the negative supply to keep the supply
current from increasing.
Other precautions include:
1. Use a ground plane (see Design Note 50, High Fre-
quency Amplifier Evaluation Board).
2. Do not use high source impedances. The input
capacitance of 2pF and RS = 10k for instance, will give
an 8MHz – 3dB bandwidth.
Murphy Circuits
3. PC board socket may reduce stability.
There are several precautions the user should take when
using the LT1190 in order to realize its full capability.
Although the LT1190 can drive a 50pF load, isolating the
capacitance with 10Ω can be helpful. Precautions prima-
rily have to do with driving large capacitive loads.
4. Afeedbackresistorof1korlowerreducestheeffectsof
stray capacitance at the inverting input. (For instance,
closed-loop gain of 2 can use RFB = 300Ω and RG =
300Ω.)
Driving Capacitive Load
Driving Capacitive Load
LT1190 • TA11
LT1190 • TA12
AV = –1, IN DEMO BOARD, CL = 50pF
AV = –1, IN DEMO BOARD, CL = 50pF
WITH 10Ω ISOLATING RESISTOR
Murphy Circuits
5V
5V
5V
3
2
3
2
3
2
7
7
7
+
+
–
+
–
COAX
6
6
6
LT1190
LT1190
LT1190
–
4
4
4
1X SCOPE
PROBE
–5V
–5V
–5V
SCOPE
PROBE
LT1190 • TA13
An Unterminated Cable Is
a Large Capacitive Load
A 1X Scope Probe Is a
Large Capacitive Load
A Scope Probe on the Inverting
Input Reduces Phase Margin
10
LT1190
W
W
SI PLIFIED SCHE ATIC
+
7
V
V
V
BIAS
BIAS
C
M
+
3
C
FF
2
–
V
6
+V
+V
OUT
*
–
4
V
LT1190 • TA14
5
1
8
SHDN
BAL
BAL
*SUBSTRATE DIODE, DO NOT FORWARD BIAS
U
PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
J8 Package
8-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.405
(10.287)
MAX
0.005
(0.127)
MIN
0.200
(5.080)
MAX
0.045 – 0.068
0.300 BSC
(0.762 BSC)
(1.143 – 1.727)
FULL LEAD
OPTION
6
5
4
8
7
0.015 – 0.060
(0.381 – 1.524)
0.025
(0.635)
RAD TYP
0.220 – 0.310
(5.588 – 7.874)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
J8 1298
1
2
3
0.045 – 0.065
(1.143 – 1.651)
0.125
3.175
MIN
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
OBSOLETE PACKAGE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LT1190
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
8
1
7
6
5
4
0.065
(1.651)
TYP
0.255 ± 0.015*
(6.477 ± 0.381)
0.009 – 0.015
(0.229 – 0.381)
0.125
0.020
(0.508)
MIN
(3.175)
MIN
+0.035
–0.015
2
3
0.325
0.018 ± 0.003
0.100
(2.54)
BSC
N8 1098
+0.889
8.255
(0.457 ± 0.076)
(
)
–0.381
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 1298
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
3
4
2
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1357
High Speed Operational Amplifier
High Speed Operational Amplifier
50MHz Gain Bandwidth, 800V/µs Slew Rate, I = 5mA Max
S
LT1360
25MHz Gain Bandwidth, 600V/µs Slew Rate, I = 2.5mA Max
S
1190fa LT/CP 0801 1.5K REV A • PRINTED IN THE USA
LINEAR TECHNOLOGY CORPORATION 1991
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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